I am scared my boyfriend is losing interest

My boyfriend and I started dating in September and by December we found out we're having a kid. We have had a great relationship so far and he is actually happy and excited for the baby as well as his parents who love me to death. His mom is always trying to cook for me and wants to be very involved and my boyfriend is always so loving when we're together ... But lately he acts distant and weird. In my opinion. He hardly texts me on his own and he seems to be somewhere else in his head... it bothers me so I talk about it with him, but he always reassures me that everything is okay and hes not cheating and he never would... I believe him, but at the same time I cant be sure

... I don't want to keep bringing up that I want him to be more in to the relationship because if hes distancing himself I dont want to push him away, but I'm pregnant and anxious that hes losing interest in me.

When we are together we're inseparable, but we work different jobs now and are always busy and tired... I guess part of me is being immature in a way for being needy and wanting attention, but I really am such a romantic person that I really want him to want to text me on his own or call to say goodnight...

Any advice??? I'm probably just being hormonal idek